To determine the correct chronological order of key events in the exploration of space based on historical timelines, here is the breakdown of the events listed in the responses:
- First humans in space: This occurred on April 12, 1961, with Yuri Gagarin aboard Vostok 1.
- First humans on the moon: This occurred on July 20, 1969, during the Apollo 11 mission.
- First space shuttle flight: The first flight of the Space Shuttle, STS-1, took place on April 12, 1981.
- Hubble Space Telescope launch: The Hubble Space Telescope was launched on April 24, 1990.
- Last humans on the moon: Apollo 17, the last crewed mission to the Moon, landed on December 11, 1972.
Given this information, the correct chronological order from the responses provided is:
- First humans in space
- First humans on the moon
- First space shuttle flight
Thus, the correct response is: first humans in space, first space shuttle flights, first humans on the moon.